Subtract 8/20 from 45/7
1st number: 6 3/7, 2nd number: 8/20
45/7 - 8/20 is 211/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
45/7 = 45 × 20/7 × 20 = 900/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
8/20 = 8 × 7/20 × 7 = 56/140 - Subtract the two like fractions:
900/140 - 56/140 = 900 - 56/140 = 844/140 - After reducing the fraction, the answer is 211/35
- In mixed form: 61/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-8/20 45/7-16/20 45/14-8/20 45/7-8/40 45/7-24/20 45/21-8/20 45/7-8/60 45/7-40/20 45/35-8/20 45/7-56/20 45/49-8/20